Short-term, community-based projects—from pop-up parks to open streets initiatives—have become a powerful and adaptable new tool of urban activists, planners, and policy-makers seeking to drive lasting improvements in their cities and beyond. These quick, often low-cost, and creative projects are the essence of the Tactical Urbanism movement. Tactical Urbanism, written by Mike Lydon and Anthony Garcia, two founders of the movement, promises to be the foundational guide for urban transformation. Tactical Urbanism will inspire and empower a new generation of engaged citizens, urban designers, land use planners, architects, and policymakers to become key actors in the transformation of their communities.